Malicious PDF — malware analysis report

Static analysis result for SHA-256 602d9f3e3a6d8f2a…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 22:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f69add28e5371670f7eb876432f98714 SHA-1: ca1c1b7f3ffbb894da40e47ccc82b3a868e8eeb6 SHA-256: 602d9f3e3a6d8f2a9079a15c66eaef9df65d0cda4d70bfac1ed789c1d4fbe961
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high-severity heuristic firing indicating it links to a game hack redirector, specifically for Coin Master. The embedded URL and document body text reinforce this lure, aiming to trick users into visiting a malicious site. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-free-spins-hack-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-uc-zip-file_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E6 24872 bytes
SHA-256: c5908a1c689f32f1a1687c63dcacec27adce1c86350c8c405c7fc6939b1e0866
font_01_sfnt_off000089fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FA 18056 bytes
SHA-256: 5bc30252b20e252a4e4f12754ee6fd7a8bdc905346c0352a18cf9aa56584dd16

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